JPH0343473Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a disc brake incorporating a toggle type parking mechanism.

(Prior Art) As a disc brake incorporating a toggle type parking mechanism, one shown in FIG. 4 has been proposed.

In the figure, 1 is a disk, 2 is a pad fixed to the calibar body 5, and 3 is a pad that works with the piston 4. By pressing the disk 1 from both sides with these pads 2 and 3, the brake is activated. It's becoming like that.

When parking, when the parking lever 8 is rotated, the shaft 9 rotates, and the rod 10 attached to the eccentric end of the shaft moves to the left in the figure, and the adjustment bolt 11 and As the piston 4 moves to the left via the adjusting nut 12, the pad 3, which is fixed to the left end of the piston 4 which abuts the base end 12a of the adjusting nut 12, presses the disk 1 with the pad 2. Thereby, rotation of the disk 1 is prevented by frictional contact between the pads 2 and 3 and the disk 1.

When assembling the rod 10 of this conventional disc brake with toggle type parking mechanism, the shaft 9 is positioned on the caliper body 5, the rod receiving part 9a of the shaft is rotated in the direction of the piston 4,
After one end 10a of the rod 10 is placed in the rod receiving portion 9a in a substantially vertical direction, the other end 10b of the rod 10 is
Assemble the adjustment bolt 11 using the .

(Problem to be solved by the invention) However, in the case of the conventional disc brake with a toggle type parking mechanism, when the rod is set up in the rod receiving part of the shaft of the parking lever, the rod tends to fall over, making it difficult to assemble the rod. The attachment work was becoming complicated.

The present invention was developed to solve this problem, and it facilitates the assembly of the rod as an intermediate member that interlocks the adjusting bolt, which is a part of the piston, with the parking lever. The purpose is to improve

(Means for Solving the Problems) The disc brake with toggle type parking mechanism according to the present invention is provided with a rod that interlocks with the parking lever via the toggle mechanism, and one end of this rod is one end of the piston that operates the disc brake. When fitting one end of the rod into the rod receiving recess, an annular elastic sheet is attached in advance to the outer periphery near the one end of the rod, and when the rod is fitted, This annular elastic sheet abuts around the rod receiving recess to hold the rod in the rod receiving recess.

(Function) According to the present invention, when fitting one end of the rod into the rod receiving recess provided in the piston that operates the disc brake, an annular rubber sheet is attached in advance to the outer periphery near the one end of the rod, and the annular rubber sheet is With the rubber sheet attached, one end of the rod is inserted into the rod receiving recess.

At this time, when one end of the rod comes into contact with the rod receiving recess, the side surface of the annular rubber sheet is attracted to the outer periphery of the rod receiving recess, so that the rod is placed upright in the rod receiving recess due to the suction action of this annular rubber sheet. is held in

(Example) An example of the present invention will be described based on the drawings, and substantially the same components as in FIG. 4 are given the same reference numerals. FIGS. 1 and 2 show an embodiment of a disc brake with a toggle parking mechanism according to the present invention.

One end 21a of a piston 21 that slides on the inner wall of the cylinder 20 is in contact with the back surface of the pad 3 facing the disk 1 with a clearance therebetween, and a nut 22 is housed inside the piston 21.
The nut 22 is fixed to the piston 21 by a snap ring 23, and an adjustment bolt 24 is screwed to the nut 22.

Inside the cylinder 20, a flat plate 28 biased leftward in the figure via a spring 27 is installed at one end of a case 26 positioned on the adjuster plate 25. This flat plate 28 supports a bearing 29. The adjusting bolt 24 is biased to the left through the adjusting bolt 24.

An intermediate piston 30 that slides on the inner wall of the cylinder 20 is provided to the left of the head 24a of the adjusting bolt 24. When the intermediate piston 30 moves to the right, one end 30a of the adjusting bolt 24
The adjustment bolt 24 is pressed to the right by contacting the head 24a of the adjusting bolt 24.

One end 31a of the rod 31 is inserted into the rod receiving recess 30c provided at the other end 30b of the intermediate piston 30.
The other end 31b of the rod 31 is fitted into a rod receiving recess 32a formed at an eccentric position of the shaft 32.

An annular rubber sheet 33 is attached to one end 31a of the rod 31 around the outer periphery of the rod. This annular rubber sheet 33 is attached to one end 31 of the rod 31.
It is fitted into a predetermined outer circumferential position marked in advance at a, and as shown in FIG. 3, when it is pushed in the direction of arrow A during assembly, it will stick to one end 30b of the intermediate piston 30. .

When pressure oil acts inside the cylinder 20 from the hydraulic hole 35 during normal braking operation, the piston 21
moves to the right, and pads 3 and 2 press against disk 1.

When the parking brake is operated, the shaft 32, which is interlocked with a parking lever (not shown), rotates counterclockwise in FIG. By moving the piston 21 to the right via the stop bolt 24 and nut 22, the pad 3
Press disk 1 with and 2. As a result, the rotation of the disk 1 is stopped due to frictional contact between the pads 2 and 3.

According to this embodiment, when assembling the parking mechanism 37, the shaft 32 is inserted into the insertion hole 38 formed at the left end of the cylinder 20, and one end 31b of the rod 31 is set in the rod receiving recess 32a of the shaft 32. In this case, as shown in FIG. 3, one end 31a of the rod 31 is pushed in the direction of the arrow A and is erected approximately vertically in advance in the rod receiving recess 30c of the intermediate piston 30 by the suction action of the annular rubber sheet 33. Therefore, the other end 31b of the rod can be easily fitted into the rod receiving portion 32a of the shaft 32.

Although the intermediate piston 30 is provided in this embodiment, the present invention can also be applied to a type of disc brake that does not have the intermediate piston 30. In this case, the rod receiver is attached to one end of the adjusting bolt. A recess corresponding to the recess may be provided.

(Effects of the invention) According to the invention, when assembling a disc brake with a parking mechanism, the rod is placed in the rod receiving recess of the intermediate piston in advance by the contact or suction action of the annular rubber sheet attached to the outer periphery of one end of the rod. Since it can be propped up, the other end of the rod can be easily assembled to the toggle mechanism without shifting the center line of the rod.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view taken along the - line in Fig. 2, Fig. 2 is a plan configuration diagram showing an embodiment of the present invention, Fig. 3 is a sectional view showing the assembled state of the rod to the intermediate piston, and Fig. 4 is FIG. 2 is a sectional view showing a conventional example. 1...disk, 2,3...pad, 20...
Cylinder, 21...piston, 22...nut,
24... Adjustment bolt, 30... Intermediate piston, 30c... Rod receiving recess, 31... Rod,
32... Shaft, 33... Annular rubber sheet, 3
7...Parking mechanism.

Claims (1)

[Scope of utility model registration request] In a disc brake with a toggle type parking mechanism, the parking lever is provided with a rod interlocked via a toggle mechanism, and one end of the rod is fitted into a rod receiving recess provided at one end of a piston that operates the disc brake. When fitting one end of the rod into the recess, an annular elastic sheet is attached in advance to the outer periphery near the one end of the rod, and when the rod is fitted, this annular elastic sheet comes into contact with the periphery of the rod receiving recess. A disc brake with a toggle type parking mechanism, characterized in that the rod is held in the rod receiving recess.